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公开(公告)号：US2917819A
公开(公告)日：1959-12-22
申请号：US57703256
申请日：1956-04-09
Applicant: PFAUDLER PERMUTIT INC
Inventor： BRITTON ORSON J , HOLTZ ERNEST F
CPC classification number: B23P6/04 , F16B33/004 , Y10S411/915 , Y10T29/49734 , Y10T29/49744 , Y10T29/49885
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